Report error on failure to create SkCodec

Update NewFromStream to report an error on failure to create an
SkCodec, so that a client can distinguish between
- not enough data
- invalid data

In Chromium, this will allow blink::ImageDecoder to call SetFailed if
the stream is invalid early and we never create an SkCodec. Without
this, ImageDecoder will keep trying to create an SkCodec when it
receives more data.

Change-Id: I4f505c56d91c982be36a828fd0f7db17b1596588
Reviewed-on: https://skia-review.googlesource.com/22642
Commit-Queue: Leon Scroggins <scroggo@google.com>
Reviewed-by: Derek Sollenberger <djsollen@google.com>
Reviewed-by: Chris Blume <cblume@chromium.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/codec/SkWebpCodec.h b/src/codec/SkWebpCodec.h
index c911ebd585..e06d0972fe 100644
--- a/src/codec/SkWebpCodec.h
+++ b/src/codec/SkWebpCodec.h
@@ -28,7 +28,7 @@ static const size_t WEBP_VP8_HEADER_SIZE = 30;
 class SkWebpCodec final : public SkCodec {
 public:
     // Assumes IsWebp was called and returned true.
-    static SkCodec* NewFromStream(SkStream*);
+    static SkCodec* NewFromStream(SkStream*, Result*);
     static bool IsWebp(const void*, size_t);
 protected:
     Result onGetPixels(const SkImageInfo&, void*, size_t, const Options&, int*) override;